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-rw-r--r--skia/sgl/SkEdge.h93
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diff --git a/skia/sgl/SkEdge.h b/skia/sgl/SkEdge.h
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--- a/skia/sgl/SkEdge.h
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-/* libs/graphics/sgl/SkEdge.h
-**
-** Copyright 2006, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-** http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-#ifndef SkEdge_DEFINED
-#define SkEdge_DEFINED
-
-#include "SkRect.h"
-
-struct SkEdge {
- enum Type {
- kLine_Type,
- kQuad_Type,
- kCubic_Type
- };
-
- SkEdge* fNext;
- SkEdge* fPrev;
-
- SkFixed fX;
- SkFixed fDX;
- int32_t fFirstY;
- int32_t fLastY;
- int8_t fCurveCount; // only used by kQuad(+) and kCubic(-)
- uint8_t fCurveShift; // appled to all Dx/DDx/DDDx except for fCubicDShift exception
- uint8_t fCubicDShift; // applied to fCDx and fCDy only in cubic
- int8_t fWinding; // 1 or -1
-
- int setLine(const SkPoint& p0, const SkPoint& p1, const SkIRect* clip,
- int shiftUp);
- inline int updateLine(SkFixed ax, SkFixed ay, SkFixed bx, SkFixed by);
- void chopLineWithClip(const SkIRect& clip);
-
- inline bool intersectsClip(const SkIRect& clip) const {
- SkASSERT(fFirstY < clip.fBottom);
- return fLastY >= clip.fTop;
- }
-
-#ifdef SK_DEBUG
- void dump() const {
- #ifdef SK_CAN_USE_FLOAT
- SkDebugf("edge: firstY:%d lastY:%d x:%g dx:%g w:%d\n", fFirstY, fLastY, SkFixedToFloat(fX), SkFixedToFloat(fDX), fWinding);
- #else
- SkDebugf("edge: firstY:%d lastY:%d x:%x dx:%x w:%d\n", fFirstY, fLastY, fX, fDX, fWinding);
- #endif
- }
-
- void validate() const {
- SkASSERT(fPrev && fNext);
- SkASSERT(fPrev->fNext == this);
- SkASSERT(fNext->fPrev == this);
-
- SkASSERT(fFirstY <= fLastY);
- SkASSERT(SkAbs32(fWinding) == 1);
- }
-#endif
-};
-
-struct SkQuadraticEdge : public SkEdge {
- SkFixed fQx, fQy;
- SkFixed fQDx, fQDy;
- SkFixed fQDDx, fQDDy;
- SkFixed fQLastX, fQLastY;
-
- int setQuadratic(const SkPoint pts[3], const SkIRect* clip, int shiftUp);
- int updateQuadratic();
-};
-
-struct SkCubicEdge : public SkEdge {
- SkFixed fCx, fCy;
- SkFixed fCDx, fCDy;
- SkFixed fCDDx, fCDDy;
- SkFixed fCDDDx, fCDDDy;
- SkFixed fCLastX, fCLastY;
-
- int setCubic(const SkPoint pts[4], const SkIRect* clip, int shiftUp);
- int updateCubic();
-};
-
-#endif